public class Main {
    public static void main(String[] args) {
        Integer[] nums = {-2,0,3,-5,2,-1};
        SegmentTree<Integer> segTree = new SegmentTree<>(nums,(a,b) -> a + b);
        System.out.println(segTree);
        System.out.println(segTree.query(0, 2));
        System.out.println(segTree.query(2, 5));
        System.out.println(segTree.query(0, 5));
    }
}
